MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Periosteum
The periosteum is a dense membrane composed of fibrous connective tissue that closely wraps (invests) all bone, except that of the articulating surfaces in joints which are covered by a synovial membrane. 'Peri-' is a prefix borrowed from…
Read the definitionRandom terms
Show more- Second cranial nerve The second cranial nerve is the optic nerve, the nerve that connects the eye to the brain and carries the…
- Basophil A type of leukocyte (white blood cell) with coarse bluish-black granules of uniform size within the cytoplasm…
- Lung transplant The first lung transplant was done by the American surgeon James Hardy (1918-) in 1964.
- Hyperventilation Overbreathing. This can cause dizziness, lightheadedness, weakness, shortness of breath, a sense of…
- Fear of pleasure An abnormal, excessive, and persistent fear of pleasure. Sufferers with this most puritanical of phobias…
- Empirical Based on experience and observation, rather than systematic logic. Experienced physicians often use empirical…
- Penis, inflammation of the foreskin and glans In the uncircumcised male, balanitis (inflammation of the glans, the rounded head of the penis) and posthitis…
- Perchloric acid See: Perchlorate
- Adult-onset Still disease Although Still disease was first described in children, it is known to begin in adults (rarely). Of all…
- Respiratory distress syndrome (RDS) Formerly known as hyaline membrane disease, a syndrome of respiratory difficulty in newborn infants caused by…
- Extrapyramidal system That part of the nervous system that regulates muscle reflexes
- Cancer, pancreas See: Pancreatic cancer